Antenna



FIG. 1 is a front elevational view of an antenna in accordance with the present design.

FIG. 2 is a plan view of the antenna of FIG. 1;

FIG. 3 is a right side view of the antenna of FIGS. 1 and 2;

FIG. 4 is a left side view of the antenna of FIGS. 1-3; and,

FIG. 5 is a perspective view of the antenna of FIGS. 1-4.

The antenna is shown broken away in one section to indicate that it has no specific length in that section.

The broken lines in FIG. 3 indicated portions of the antenna which form no part of the claimed design. 

The ornamental design for an antenna, as shown and described. 